多支撑挡土结构考虑开挖过程的计算方法(“C”法)  

A Calculating Method Considered the Effect of Staged Excavation for Multi - braced Retaining Wall -"C"Method

作　　者：蔡伟铭[1] 熊祚森[1] 

机构地区：[1]同济大学地下系,上海200092

出　　处：《建筑结构》1996年第7期15-21,共7页Building Structure

摘　　要：软土地基上的深基坑支护结构都采用多支撑形式,本文采用土体弹簧系数K=Cz^1/2(即通常称之为“C”法),并考虑分步开挖逐层支撑的施工过程对支撑力、桩身内力及位移的影响,推导了以挠曲线方程为基础的计算方法,是继“m”法之后的又一发展.该法便于计算,对于少于三道支撑的情况,用手算也很方便,对于更多支撑的情况则可采用电算.“C”法比“m”系数法更适合于软土地基,计算结果与实测位移曲线很吻合.Multi-Braced retaining structures have been widly employed in deep excavation. A calculating method using spring factor of K = C is presented in this paper, having taken into account the effect of staged excavation upon the bracing force, and the internal force and displacement of retaining wall. This is a development following 'm' method. For soft soil, the results calculated from 'C' method are consistent with the measured value better than that form 'm' method.

关 键 词：深基坑 支挡结构 开挖 多支撑 弹簧地基 

分 类 号：TU753.1[建筑科学—建筑技术科学]